Kassam Stadium - which is the away section?

Please forgive me, but I have never been to a football game before, and I'm considering going to one before I move from Oxford. Can someone tell me if the Away section is only 27-29, or the entire 24-29? I don't want to mess up and accidentally cheer for the wrong team... Also, any advice for someone who has never been to a match and has anxiety? How early/late should I turn up if I have booked tickets in advance?

https://preview.redd.it/cchx6sk9tphe1.png?width=773&format=png&auto=webp&s=168c50debeee2c9dd09ac6a132183107a50d08b5